Control Circuits in Power Electronics: Practical Issues in by Miguel Castilla

By Miguel Castilla

Control Circuits in energy Electronics: sensible concerns in layout and Implementation describes useful concerns regarding the layout and implementation of regulate circuits within the operation and function of strength electronics converters. The booklet specializes in a variety state of the art keep watch over strategies, together with circuit expertise, layout recommendations, and implementation issues.

Topics lined include:

* PWM-based sliding mode keep an eye on schemes for DC-DC energy converters
* Synthetic-ripple hysteretic controllers for DC/DC converters
* One-cycle managed unmarried section energy inverters
* electronic PWM keep an eye on of high-frequency DC-DC switched-mode energy converters
* Microcontroller-based digital ballasts for high-intensity-discharge lamps
* FPGA-based controllers for direct sliding mode keep watch over of PWM increase rectifiers
* DSP controllers for three-phase unity-power-factor rectifiers and voltage-sourced inverters
* FPGA-DSP controllers for DC-DC converters in renewable power purposes, topologies, modulation and regulate of multilevel converters
* cutting-edge clever gate drivers for IGBT strength modules
* keep an eye on of built-in switched capacitor strength converters
* DSP-based average body regulate schemes for three-phase unity-power-factor rectifiers
* Dual-core DSP for regulate and verbal exchange in AC microgrids
* using computational intelligence for designing energy electronics converters.

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Extra resources for Control Circuits in Power Electronics: Practical Issues in Design and Implementation (Iet Power and Energy)

Sample text

For modern DC/DC converters obtaining an ideal piecewise linear ripple for hysteretic PWM generation is difficult due to following reasons: (a) In order to keep efficiency high, use of a large valued sensing resistor for current sensing is avoided, (b) voltage regulation requirement is very stringent with strict regulation limits, which forces the output ripple to be negligibly small, (c) high switching frequency of the converter leads to high frequency interference during current or voltage sensing [1, 2].

2. Here all the non-idealities of the building blocks, which can lead to corrupt hysteretic operation are identified. 3. 4. 5 explains methods to improve the dynamic of response of a synthetic hysteretic modulator even further. 1 Hysteretic controllers for DC/DC converters Ideally, a triangular modulating signal is required for a hysteretic modulator. The switching instances of the converter are decided by the intersections of the modulating signal (Vmod ) and a DC reference, called the command signal (Vcmd ).

This drooping behaviour is quite useful reducing output capacitors when converters have high transient loads and need to meet tighter regulation [8]. In this case, even with a smaller rL, a larger droop resistance can be realized. 21. 20. This circuit has the advantage that only low-frequency signals (Vin and Vo) are sensed by the ripple synthesizer. With the absence of any high-frequency switching signal fed directly from the converter, this implementation is relatively noise-free and easy to implement in an IC-based design.

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